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TAS5421-Q1 Datasheet(PDF) 10 Page - Texas Instruments |
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TAS5421-Q1 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 33 page PVDD GVDD PVDD BSTN GND OUTN OUTP GND GVDD BSTP IN_P IN_N GND Control Speaker Guard Gain Control Pulse Width Modulator (PWM) Gate Drive Gate Drive Overcurrent Detection DC Detection Thermal Protection Voltage Protection Protection Control Diagnostics Control Short-to-Ground Short-to-Power Shorted Load Open Load Preamplifier PVDD GVDD BYP LDO Regulator FAULT STANDBY MUTE SDA SCL I C 2 Biases and References TAS5421-Q1 SLOS814C – MARCH 2014 – REVISED JANUARY 2015 www.ti.com 7 Detailed Description 7.1 Overview The TAS5421-Q1 is a mono analog-input audio amplifier for use in the automotive environment. The design uses an ultra-efficient class-D technology developed by Texas Instruments, but with features added for the automotive industry. This technology allows for reduced power consumption, reduced heat, and reduced peak currents in the electrical system. The device realizes an audio sound system design with smaller size and lower weight than traditional class-AB solutions. There are seven core design blocks: • PWM • Gate drive • Power FETs • Diagnostics • Protection • Power supply • I2C serial communication bus 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Analog Audio Input and Preamplifier The differential input stage of the amplifier cancels common-mode noise that appears on the inputs. For a differential audio source, connect the positive lead to IN_P and the negative lead to IN_N. The inputs must be ac-coupled to minimize the output dc-offset and ensure correct ramping of the output voltages. For good transient performance, the impedance seen at each of the two differential inputs should be the same. The gain setting impacts the analog input impedance of the amplifier. See Table 1 for typical values. 10 Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: TAS5421-Q1 |
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